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https://github.com/italicsjenga/slang-shaders.git
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126 lines
4 KiB
Plaintext
126 lines
4 KiB
Plaintext
#version 450
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/*
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CRT - Guest - Dr. Venom - Pass1
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Copyright (C) 2018-2019 guest(r) - guest.r@gmail.com
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Incorporates many good ideas and suggestions from Dr. Venom.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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layout(push_constant) uniform Push
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{
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vec4 SourceSize;
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vec4 OriginalSize;
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vec4 OutputSize;
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uint FrameCount;
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float h_sharp;
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float s_sharp;
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float h_smart;
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} params;
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#pragma parameter h_sharp "Horizontal sharpness" 5.00 1.5 20.0 0.25
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#define h_sharp params.h_sharp
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#pragma parameter s_sharp "Substractive sharpness" 0.05 0.0 0.20 0.01
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#define s_sharp params.s_sharp
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#pragma parameter h_smart "Smart Horizontal Smoothing" 0.0 0.0 1.0 0.1
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#define h_smart params.h_smart
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#define SourceSize params.SourceSize
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layout(std140, set = 0, binding = 0) uniform UBO
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{
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mat4 MVP;
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} global;
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#pragma stage vertex
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layout(location = 0) in vec4 Position;
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layout(location = 1) in vec2 TexCoord;
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layout(location = 0) out vec2 vTexCoord;
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void main()
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{
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gl_Position = global.MVP * Position;
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vTexCoord = TexCoord * 1.00001;
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}
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#pragma stage fragment
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layout(location = 0) in vec2 vTexCoord;
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layout(location = 0) out vec4 FragColor;
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layout(set = 0, binding = 2) uniform sampler2D Source;
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layout(set = 0, binding = 3) uniform sampler2D SmoothPass;
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#define COMPAT_TEXTURE(c,d) texture(c,d)
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#define PassPrev2Texture SmoothPass
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void main()
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{
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vec2 ps = SourceSize.zw;
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vec2 OGL2Pos = vTexCoord * SourceSize.xy;
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vec2 fp = fract(OGL2Pos);
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vec2 dx = vec2(ps.x,0.0);
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vec2 dy = vec2(0.0, ps.y);
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vec2 pC4 = floor(OGL2Pos) * ps + 0.5*ps;
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// Reading the texels
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vec2 x2 = 2.0*dx;
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vec2 y2 = 2.0*dy;
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bool sharp = (s_sharp > 0.0);
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float hsharp_tl, hsharp_tr, hsharp_tc; float s_sharpl = s_sharp; float s_sharpr = s_sharp; float s_sharpc = s_sharp;
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if (h_smart == 0.0)
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{
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hsharp_tl = h_sharp; hsharp_tr = h_sharp; hsharp_tc = h_sharp;
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}
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else
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{
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// reading differences for smoothing
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vec2 diffs = COMPAT_TEXTURE(PassPrev2Texture, pC4).xy;
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float ls = mix (4.25, 2.25, h_smart);
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hsharp_tl = mix(h_sharp, ls, diffs.x);
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hsharp_tr = mix(h_sharp, ls, diffs.y);
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s_sharpl = mix(s_sharp, 0.0, diffs.x);
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s_sharpr = mix(s_sharp, 0.0, diffs.y);
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hsharp_tc = hsharp_tl;
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if (fp.x == 0.5) { hsharp_tc = 0.5*(hsharp_tl + hsharp_tr); s_sharpc = 0.5*(s_sharpl + s_sharpr); }
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if (fp.x > 0.5) { hsharp_tc = hsharp_tr; }
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}
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float wl2 = 1.5 + fp.x; wl2*=wl2; float twl2 = exp2(-hsharp_tl*wl2); twl2 = max(twl2 - s_sharpl, -twl2);
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float wl1 = 0.5 + fp.x; wl1*=wl1; float twl1 = exp2(-hsharp_tl*wl1); twl1 = max(twl1 - s_sharpl, -0.4*s_sharpl);
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float wct = 0.5 - fp.x; wct*=wct; float twct = exp2(-hsharp_tc*wct); twct = max(twct - s_sharpc, s_sharpc);
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float wr1 = 1.5 - fp.x; wr1*=wr1; float twr1 = exp2(-hsharp_tr*wr1); twr1 = max(twr1 - s_sharpr, -0.4*s_sharpr);
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float wr2 = 2.5 - fp.x; wr2*=wr2; float twr2 = exp2(-hsharp_tr*wr2); twr2 = max(twr2 - s_sharpr, -twr2);
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float wtt = 1.0/(twl2+twl1+twct+twr1+twr2);
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vec3 l2 = COMPAT_TEXTURE(Source, pC4 -x2).xyz;
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vec3 l1 = COMPAT_TEXTURE(Source, pC4 -dx).xyz;
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vec3 ct = COMPAT_TEXTURE(Source, pC4 ).xyz;
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vec3 r1 = COMPAT_TEXTURE(Source, pC4 +dx).xyz;
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vec3 r2 = COMPAT_TEXTURE(Source, pC4 +x2).xyz;
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vec3 color = (l2*twl2 + l1*twl1 + ct*twct + r1*twr1 + r2*twr2)*wtt;
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if (sharp) color = clamp(color, 0.8*min(min(l1,r1),ct), 1.2*max(max(l1,r1),ct));
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FragColor = vec4(color, 1.0);
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} |